Psychological Significance of Colors Sir Isaac Newton discovered the color spectrum, its organization, and its composition. However, studies show that as early as the ancient Egyptian period, humans have used colors to create the moods of spaces to achieve a holistic design Johann Wolfgang von Goethe wrote the book Theory of Colors in 1810. Several studies on the psychology of colors were done and the general findings are stated below: Red-orange -heat , stimulation, activity, richness, splendor, dignity Pink -daintiness, gaiety, animation Yellow , yellow-green - dryness, crispness, relaxation, warmth, light, cheer Green-blue -coldness, spaciousness, passivity, tranquility Violet -coolness, limpness, dullness, daintiness, reservation, femininity1 Brown -warmth